Rockwell Automation 1779-KP3R DATA HIGHWAY II - Manual (Page 54)

Appendix
A
AĆ1
Operation and Troubleshooting
This appendix contains information to aid in operating and
troubleshooting your 1779–KP3 module. It covers the following topics:
an overview of the KP3 module during operation
LED indicators
using the Exit Request switch
troubleshooting the KP3 module
The following sections provide information on the way in which the KP3
operates.
Power-up
After the KP3 module is powered–up, it goes through self–diagnostic
tests. If no faults are detected, the PASS indicator turns green, and the
module is running. Initially, the PORT–READY indicator turns green
and the IN–RING/SEEKING–MEM indicator turns yellow to indicate that
this node is seeking membership.
During Normal Operation
If another communication interface is connected in the Data Highway II
link and is operational, the SIG QUAL indicator turns green and then the
IN–RING/SEEKING–MEM indicator turns from yellow to green to
indicate that this node is now logically in a ring and receiving the token
periodically.
If there is a cabling problem or no other communication interface is
operational, then every ten seconds the MAC board goes through a
one–second self–diagnostic test. This is indicated by the MAC–TEST
indicator turning yellow and the IN–RING/SEEKING–MEM and
REDUN WARN indicators flashing rapidly.
Appendix Objectives
KP3 Operation